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← HistoryWhich consequence resulted when blast furnaces used coke for Ming-era iron production?
A)Increased sulfur contamination of iron✓
B)Higher temperatures reduced porosity
C)Slag production decreased markedly then
D)Carbon content reduced unexpectedly overall
💡 Explanation
Increased sulfur contamination occurred because coke introduced sulfur impurities into the molten iron during smelting via carburization; therefore, the iron's quality decreased due to embrittlement, rather than higher quality or reduced slag.
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